[Webkit-unassigned] [Bug 189534] New: the second part of an element with filter that is split by a column-span disappears

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189534

            Bug ID: 189534
           Summary: the second part of an element with filter that is
                    split by a column-span disappears
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbaron at dbaron.org
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 349499

  --> https://bugs.webkit.org/attachment.cgi?id=349499&action=review

testcase

In the testcase http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%0A.set%20%7B%20column-count%3A%202%3B%20height%3A%20100px%3B%20width%3A%20300px%3B%20background%3A%20yellow%3B%20column-fill%3A%20auto%20%7D%0A.filter%20%7B%20filter%3A%20blur(1px)%3B%20background%3A%20aqua%20%7D%0A.span%20%7B%20column-span%3A%20all%3B%20background%3A%20fuchsia%20%7D%0A%0A%3C%2Fstyle%3E%0A%0A%3Cdiv%20class%3D%22set%22%3E%0A%20%20A%0A%20%20%3Cdiv%20class%3D%22filter%22%3E%0A%20%20%20%20B%0A%20%20%20%20%3Cdiv%20class%3D%22span%22%3EC%3C%2Fdiv%3E%0A%20%20%20%20D%0A%20%20%3C%2Fdiv%3E%0A%20%20%20%20E%0A%3C%2Fdiv%3E , there is an element with a filter containing an element with column-span:all.  The column-span causes the second part of the element with the filter to disappear.  If the 'filter' property is removed, then everything is fine.

Note that Edge displays correct behavior; Chrome has a different bug with the testcase, filed at https://bugs.chromium.org/p/chromium/issues/detail?id=883151

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